Williams won on Wednesday, 4 March 2009 and received his cheque on Friday 6 March from the station's breakfast team, Pieter Möller and Christie Hansen.
The promotion has been on the air for just over two weeks and, according to Tim Zunckel, programme manager of OFM, generated an amazing amount of responses via SMS, email, the station's website and on the phones.
He added that the station had an amazing response in the last days of the competition with the online game getting more than 4817 entries and over 2000 SMS entries.
Listeners had to identify the following 10 songs and their artist in 10 seconds: